These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Complete Monster: Enter is shaping up to be one, given the total glee he takes in doing what he does. The biggest example was making a Metaroid at the hospital in Mission 3, which ran around turning people into robots, while Enter drained the hospital's supply of energy to create Mooks, which would cause the ICU unit to run out of power and result in the deaths of a large number of people. Enter gleefully admits that this was solely for Messiah's amusement and was having a hell of a time himself. As of #10, it has been revealed that turning people into robots is not just once-in-a-week plan, but something he can do in daily basis. Not to mention that he's not above using these robot-men as human shields and doesn't care if these men get sucked into hyperspace for a horrible fate.
When people compare you to Basco, you know you're a monster.
Ensemble Darkhorse: Enter has proven to be quite popular amongst fans, who like him not only because of his enjoyment of being the bad guy, but also due to being a quite credible threat, being able to go toe-to-toe with the Go-Busters in fights and succeeding in several of his missions. His proving to be very Dangerously Genre Savvy and learning for his mistakes as the show moves on has made fans like him even more.
Among the heroes, the most popular character is, oddly, Usada.
Now we have Beet Buster and Stag Buster. Their hilarious antics and awesome design and fighting style really help.
Since the 'exporting' of Super Sentai internationally under the name Power Rangers is old news by now in Japan, the whole premise of Rangers protecting their world's power supply (the whole Enetron shebang) may have been Toei's attempt to create literal Power Rangers.
One old rumor before Go-Busters aired was that Gavan would be the teams mentor. Thirty episodes later, guess who appears? Well... Mind you, not the one we were thinking of.
In #33, the Powered Custom Super Mode involves an addon to the morpher that fuses our heroes bodily with their Buddyroid partners... kinda like CycloneJokerXtreme. As if reinforcing this, Red sticks to close-quarter combat (like CycloneJoker), Blue summons a girder that he uses like a staff (HeatMetal), and Yellow sticks with the shooting (LunaTrigger)!
Ryuji was not the first blue ranger to have problems with Overheating. Gosei Blue had in one episode too and, while Ryuji gets psychotical, Hyde gets HILARIOUS.
Ho Yay: With Shelly and Yōko in episode 31 splitting desserts.
And in Mission 49, he goes even further, assimilating an Enetron tank, turning it into a Megazord, along with dozens of innocent employees. He even attempted to absorb children! And his final plan has him doing this all over the world. As if we needed any more reason for him to be deleted!
Narm: Half the fanbase considers it Darker and EdgierDeconstruction. The other half of the fanbase is rolling their eyes at chickens and not eating enough candy being weaknesses.
Overheated Ryūji is badass, but his way of fighting was utterly sadistic even for Sentai standards and terrifying. No wonder Yōko was scared out of her pants.
For that matter, both Yōko's and Hiromu's weak points border on And I Must Scream.
Enter after his defeat in Mission 30. Somehow him becoming more stoic and calm with only occasional traces of his troll-like persona remaining. Somehow this makes him even more disturbing than he already was.
Well, Escape's megazord debut. She takes Enter and CRUSHES him using the megazord's hands. It's pretty graphical for a show like this and there's the crushing sound to make everything better.
Episode 30. After spending 13 years and all the series trying to save their families, the episode has our heroes forced to sacrifice their loved ones to foil the Big Bad. Made even worse when the team leave hyperspace, and each of the original trio try to deal with their pain in a different way.
Episode 50. Jin pulls a Heroic Sacrifice to destroy Card no. 13, freeing Hiromu and ending Enter's immortality. His speech beforehand, the reactions of the heroes to his plan and his and Hiromu's father's data remnants telling them to return home after Enter's defeat only adds to it all. So long, Beet Buster...
In Go-Busters vs. Gokaiger, the Buddyloids have to use some of their own Enetron to transport everyone back to the present from where they were trapped in the past. This, combined with taking damage during the transport, causes damage to their programs, and when they're finally repaired they no longer have their personalities. The Busters don't take it well. And then later they actually have to go into battle with Go-Buster Oh this way.